<template>
  <header>
    <nav>
      <ul class="nav-bar">
        <li class="nav-item"><a href="###">首页</a></li>
        <li class="nav-item"><a href="###">新闻</a></li>
        <li class="nav-item"><a href="###">产品</a></li>
      </ul>
    </nav>
  </header>
</template>
